P2443 OBD-II Trouble Code: Secondary Air Injection System Switching Valve Stuck Closed Bank 2

Our certified mechanics come to you · 12-month, 12,000-mile warranty

SCHEDULE P2443 DIAGNOSTIC Get a fair and transparent estimate upfront
Red-stars EXCELLENT RATING ON

Cost of diagnosing the P2443 code

P2443 is a diagnostic trouble code (DTC) for "Secondary Air Injection System Switching Valve Stuck Closed Bank 2". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic for $70.00. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $30.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.

Cars Estimate Credit towards follow-up repair Earliest Availability
Ford$70.00$30.00
Toyota$70.00$30.00
BMW$70.00$30.00
SCHEDULE P2443 DIAGNOSTIC Get a fair and transparent estimate upfront

Check Engine Light

P2443 code definition

Secondary Air Injection System Switching Valve Stuck Closed Bank 2

What the P2443 code means

P2443 is an OBD-II generic code for the engine control module (ECM) detecting the exhaust pressure sensor is detecting no exhaust pulse when the bank 2 switching valve is commanded to be open while the engine is running.

What causes the P2443 code?

  • The engine control module (ECM) monitors the exhaust pressure sensors to determine if the air injection system is operating correctly when it commands the switching valve open and closed.

  • The code is set when the air injection system switching valve is commanded open and the sensor is detecting no exhaust pulse indicating the valve is stuck closed or the sensor is defective.

What are the symptoms of the P2443 code?

  • The Check Engine Light will be illuminated and the code is set in the ECM memory as a fault.

  • The vehicle will not run any different in most cases.

  • The vehicle will fail emission testing.

How does a mechanic diagnose the P2443 code?

  • Scans for codes and documents the code in the ECM and looks at the freeze frame data for the problem before clearing the codes and retesting

  • Clears the codes and retests to verify the code returns and two drive cycles

  • Tests the resistance of the switching valve and check as per specifications

  • Tests wiring for shorts between power supply and the pressure sensor

  • Tests the pressure sensor for proper resistance

Common mistakes when diagnosing the P2443 code?

  • Clearing ECM memory codes before checking the freeze frame data for the main failure problem, so the failure may be duplicated and repaired

  • Failing to clear the ECM codes after the codes are fixed

  • Failing to verify the failure before attempting testing and repairs

How serious is the P2443 code?

Code P2443 is an indication that the air injection system switching valve is not working or a sensor problem that will cause no drive symptoms. The exhaust emissions will be affected and will cause the vehicle to fail emission testing.

What repairs can fix the P2443 code?

  • Replacing the air control valve for the secondary air injection system
  • Replacing the exhaust pressure sensor to the secondary air injection system
  • Repairing wiring or connections to the air injection system and directed by pinpoint tests

Additional comments for consideration regarding the P2443 code

Code P2443 is for the secondary air injection switching valve stuck closed and the exhaust may have melted the valve causing it to stick closed. Make sure you correct any engine lean condition that could be the reason the exhaust is getting hotter than normal. Correct all codes retrieved.

Need help with a P2443 code?

YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.

trouble codes
P2443
Check Engine Light

Fast and easy Check Engine Light is on Inspection service at your home or office.

SCHEDULE P2443 DIAGNOSTIC
Get a fair and transparent estimate upfront

Recent Check Engine Light is on Inspection reviews

Excellent Rating


YourMechanic Check Engine Light is on Inspection Service

Average Rating

4.5/5

Number of Reviews

3,696

Rating Summary
3,372
162
42
24
96
3,372
162
42
24
96

Robert

17 years of experience
436 reviews
Robert
17 years of experience
Robert is excellent at what he does and is a very knowledgeable mechanic.
2016 JEEP GRAND CHEROKEE - CHECK ENGINE LIGHT IS ON - DENVER, COLORADO

Rigoberto

8 years of experience
517 reviews
Rigoberto
8 years of experience
Rigoberto's is very professional knowledgeable and expert most definitely.
2006 INFINITI M35 - CHECK ENGINE LIGHT IS ON - CHICAGO, ILLINOIS

Richard

18 years of experience
451 reviews
Richard
18 years of experience
5 star planning on using your service again and have recommended your service to my family and friends thanks again Richard talk soon
2003 CHRYSLER TOWN & COUNTRY - CHECK ENGINE LIGHT IS ON - FAIRBURN, GEORGIA

William

17 years of experience
118 reviews
William
17 years of experience
William was very professional and helpful.
2013 JEEP WRANGLER - CHECK ENGINE LIGHT IS ON - NAPLES, FLORIDA

More related articles

P0121 OBD-II Trouble Code: TPS "A" Circuit Range Performance Problem
P0121 code definition Throttle Pedal Position Sensor/Switch (TPS) A Circuit Range Performance Problem...
How to Buy Fuel Treatments
Adding a fuel additive to your gas tank when you fill up is one way to clean vital engine parts of deposits, improve the performance of your engine,...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...

Related questions

Q: Q: Cranks but won't start

This may happen for many reasons. There are in fact modes in your truck's computer that will trigger the ECU to shut the engine down in the event of some kind of failure that may cause major damage. This is...

Q: Engine noise at idling, Check Engine Light on

Hello. It is common for these cars to have problems with the camshaft gears making noise and causing the Engine Light to come on. If the problem persists, then damage to the motor is possible. It would be a good...

Q: My car has trouble code P0745, do I need to replace the solenoid?

Diagnostic Trouble Code P0745 refers to out of range voltage at a solenoid-operated valve that regulates hydraulic pressure in the transmission based on outputs from the Transmission Control Module (TCM). Code P0745 is set when the TCM sees an out...

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1-800-701-6230 · hi@yourmechanic.com